XC68HC08KH12 Motorola, XC68HC08KH12 Datasheet - Page 29

• Manufacturer Part Number: XC68HC08KH12
• Description: MICROCONTROLLER
• Manufacturer: Motorola

1.5.2 Power Supply Pins (V
MC68HC(7)08KH12
MOTOROLA
—
Rev. 1.0
V
the on-chip Phase-Locked Loop circuit.
V
internal circuitry of the chip.
V
The MCU operates from a single power supply.
Fast signal transitions on MCU pins place high, short-duration current
demands on the power supply. To prevent noise problems, take special
care to provide power supply bypassing at the MCU as
shows. Place the bypass capacitors as close to the MCU power pins as
possible. Use high-frequency-response ceramic capacitors for C
C
that require the port pins to source high current levels.
DDA
DD2
DD1
BULK
V
DDA
DDA
and V
and V
and V
NOTE: Values shown are typical values.
are optional bulk current bypass capacitors for use in applications
, V
C
BYPASS
10nF
SS2
SS1
SSA
SSA
, V
General Description
are the power supply and ground pins used by the
are the power supply and ground pins to the I/O pads.
are the analog power supply and ground pins used by
Figure 1-3. Power Supply Bypassing
V
DD1
SSA
, V
SS1
V
DD2
, V
DD2
C
BYPASS
10nF
MCU
, and V
V
SS2
SS2
)
V
Vbus
DD2
C
+
C
BYPASS
10nF
BULK
Advance Information
General Description
Figure 1-3
Pin Assignments
V
SS1
BYPASS
29
.